Surveying Instrument Collection
Maker |
Hewlett-Packard, Loveland, USA |
Model |
Optical Plummet HP 11424A |
Serial Number |
none |
Dimensions |
72 mm diameter, 75 mm high (eyepiece rotates with a diameter of 85 mm) |
Image |
|
Description |
The HP 11424A optical plummet can only be used in connection with the HP 11426A tribrach ('levelling base'). It was designed for the HP 3820A electronic tacheometer and its associated EDM reflectors. The eyepiece of the plummet can be rotated about the vertical axis. It uses a friction coupling and travels within a circle of 85 mm diameter. The optical plummet carries a circular bubble on top. |
History & comments |
See brochure HP "Civil Engineering Products" (Part No. 5952-9153) for details. |
Conservation |
In original carrying case (136 mm x 90 mm x 125 mm) |
Condition |
In mint condition. Snap lock of case rusted. |
Remarks |
Feltpen marking P.C. 44731 |
Dates |
Catalogued in 2007 by JMR. Photo by JMR. |